The contributions of late night hosts Johnny Carson, Steve Allen, and Jack Paar are featured. Merv Griffin emerges as a key player, Dick Cavett and Arsenio Hall discuss their years in the mix, and Regis Philbin offers revelations about his years as a late night sidekick to Joey Bishop. Sigourney Weaver offers personal details about her father Pat - the creator of "The Tonight Show." Other interviews include: Jay Leno, Steve Allen, Ed McMahon, Doc Severinsen, Merv Griffin, Barbara Eden, Joan Rivers, and Hugh Downs.